<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* .box{
            width: 200px;
            height: 200px;
            background-color: pink;
        }
        div{
            background-color: blue;
        } */
        /* .one{
            width: 100px;
            height: 100px;
            background-color: red;
         } */
        /* .box div{
            background-color: yellow;
         } */
        /* .box > div{
            background-color: green;
         } */
        /* .onebox{
            background-color: azure;
         } */
        .two {
            height: 100px;
            width: 100px;
            background-color: red;
        }

        .one+.two {
            height: 100px;
            width: 100px;
            background-color: aquamarine;


        }
    </style>

</head>

<body>
    <div class="box" id="wrap">
        <div class="one">1</div>
        <div class="two">2</div>
        <div class="two">2</div>
        <div class="two">2</div>

    </div>
</body>

</html>